[164] The term _Monism_, invented by Wolf, originally bore a different meaning from that in which Haeckel employs it. It was used to signify equally the materialistic denial of the substantiality of mind, and the idealistic denial of the substantiality of matter. Professor Haeckel, as will be seen, maintains that mind and matter are but two names for one thing. [165] _Confession of Faith of a Man of Science_ (English translation), p. 60. [166] _Ibid._, p. 10. [167] _Ibid._, p. 3. [168] _Mind and Motion._ [169] _An Easy Outline of Evolution_, by Dennis Hird, M.A., Principal of Ruskin Hall, Oxford, p. 184. [170] _Ibid._, p. 74. [171] _Confession of Faith of a Man of Science_, p. 51. [172] _Presidential Address_, _Section A_, _British Association_, Norwich, 1868. [173] "Mr. Darwin's Critics." (_Critiques and Addresses_, p. 283.) [174] _Confession of Faith of a Man of Science_, p. 19. [175] To what extremes such doctrines must logically lead is illustrated by Mr. Edmund Selous in his very interesting _Bird Watching_, where he casually observes, as a matter of course, that the "life-part" of a tom-tit is as important in the sum of things as Napoleon's (p. 248), and declares elsewhere, more formally (p. 335)--"Surely, a beautiful butterfly, that, for all time, charms--and raises by charming--some number of those who see it, does more good on this earth than any single man or woman, who, 'departing,' leaves no 'foot-prints on the sands of time.' Homer, for instance, has left his _Iliad_ and _Odyssey_, and these have been, and still are, mighty in their effects. But let them once perish, and Homer will be caught up and overtaken by almost any bird or butterfly--even a brown one." [176] _First Principles._ [177] _Riddle of the Universe_, p. 92.